void
_notmuch_string_map_iterator_destroy (notmuch_string_map_iterator_t *iterator);
+/* Create an iterator for user headers. Destroy with
+ * _notmuch_string_map_iterator_destroy. Actually in database.cc*/
+notmuch_string_map_iterator_t *
+_notmuch_database_user_headers (notmuch_database_t *notmuch);
+
/* tags.c */
notmuch_tags_t *